From 3f9ce874eb3efbce4272abbbd7fb6d17cb258cbc Mon Sep 17 00:00:00 2001
From: Scott Beamer <sbeamer@eecs.berkeley.edu>
Date: Sun, 14 Sep 2014 09:10:28 -0700
Subject: [PATCH] now can build with clang on os x, clang needs different flags
 than gcc to generate and use precompiled headers

---
 Makefile.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile.in b/Makefile.in
index 7bbf1d8..c3f7dc0 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -191,7 +191,8 @@ $(2)_deps := $$(patsubst %.o, %.d, $$($(2)_objs))
 $(2)_c_deps := $$(patsubst %.o, %.d, $$($(2)_c_objs))
 $$($(2)_pch) : %.h.gch : %.h
 	$(COMPILE) $$<
-$$($(2)_objs) : %.o : %.cc $$($(2)_gen_hdrs) $$($(2)_pch)
+# If using clang, don't depend (and thus don't build) precompiled headers
+$$($(2)_objs) : %.o : %.cc $$($(2)_gen_hdrs) $(if $(filter-out clang,$(CC)),$$($(2)_pch))
 	$(COMPILE) -c $$<
 $$($(2)_c_objs) : %.o : %.c $$($(2)_gen_hdrs)
 	$(COMPILE_C) -c $$<
-- 
2.30.2